Process of making a water resistant, animal protein adhesive, and the product thereof



] Patented July 14, 1931 UNITED STATES cnAnLns N. ooNn, GLENN nAvrnsoN, IRVING r. LAUCKS, ANn

HUGH F. nrrrnr, V

' HARRY P. IB ANKS,- or SEATTLE, wAsnING-roN rnocnss or MAKING A No Drawing.

Our

PATENT OFFICE PRODUCT invention relates to the process of making a water resistant,-protein adhesive and to the product thereof.

In the production of we have 5 sives,

water resistant adhefound that addition of carbon bisulphide and other sulphur derivatives of carbonic acid, such as xanthates, thio-carbonates and thio carbanilid, etc. to adhesive formulas comprising animal proteins and alkaline compounds, the water resistance is greatly increased in those already water resistant to some extent, and those formerly not at all water resistant become highly water resistant. Also there 1s a considerable in- 1 crease in the dry adhesion, on adhesive strength.

For instance,

., phide bonic addition of carbon bisuland other sulphur derivatives of caracid to casein glue formulas greatly ab increases the water-resistance of such casein glues.

to ordinary hide glue,

Again, addition of carbon bisulphide with or without added alkalinity, produces a water resistant glue, 0 whereas, without the addition of carbon bisul hide or/and water-resistance-producing car on-sulphur compounds the glue was not at all water resistant.

By the term animal proteins we mean to include not only milk casein and hide and l a bone glue,

fish glue, egg

teins but also albumen and other animal of carbon bisulp ide blood albumen, gelatine,

as the addition or other sulphur derivatives of carbonic acid 1s beneficial in producing-water resistance m adhesives composed in these ammal protelns,

water to some extent.

The

whole or in part of or in increasing such resistance where same already existed reactions are extremely complex. Our

experiments indicate that some thio-carbonates are formed, and additions of thio-carbonates have been 'When found to be beneficial. carbon bisulphide is added to an alkasodium thioother similar carbon-sulphur formed. Caustic soda is a common ingredient in casein glues, so that containing caustic soda,

carbon'bisulphide is added to such a it may be that f the action is due to the effect of car- THEREOF Application filed April 2 4, 1926. Serial No. 104,455.

bon bisulphide directly on the casein, and part due to the effect of the thio-carbonate or other similar compounds formed acting in turn on the casein.

On the other hand, for example with hide glue, we have found the water resistance is produced with no alkali present. In such case it appears therefore that the eifect must be due to the action of the sulphur derivative of carbonic acid directly on the protein, as these are the only two ingredients present, save water. But we also find an increased water resistance with animal'glue when a small amount ofcaustic soda or other alkali present. This added effect may then be due to the action of thio-carbonates or other sulphur derivatives ofcar'bonic acid.

We do not restrict our claims to the compounds named above but we claim as equivalents any sulphur derivatives of carbonic acid producing like effects on proteins, i. e., increased water resistance and increased dry adhesive strength. In illustration of successful formulas, including the use of carbon bisulphide and equivalent carbon-sulphur compounds, we list the following:

' p Parts (1) Casein 400 Calcium hydrates 80 Sodium silicate 280 Carbon bisulphide 20 VVater..' 1200 (2) A dry mixture consisting of:

' Lime 22 Tri sodium phosphate 6.5 Casein 66-250 Organic material of indeterminate composition 11.5 Carbon bisulphide 20 1 Water 500 (3) Dry hide glue 200 Carbon bisulphide 2 Water 600 (4) Dry hideglue 200 Carbon bisulphide 12 Water 600 (5) Dr; hide glue 20(1) 5 Calcium hydrate;.

formulas or proportions.

The process of mixin the above will be well knownto those skil ed in the art. The dry components are first mixedtogetherand then the liquid components iflf the; above formulas are added. v

We do not wish to restrictourselves to the 'ven in the above examples as other formu as andjother proportions have been found'develop water resistance in animal protein adhesives? Such adhesives pp a o;

working and other glues to :textile andpapeit-f A size, to plastic compositions,1to wall sizes and: to; other used.

What we-claim p 1. The process of I resistant adhesive which-{comprises Purposes for'i'which" adh ,7 g

alkaline compound and carbon bisulphide. I3. A water resistant adhesive composition comprising casein, an alkaline compound and a sulphur derivative of carbonic'acid.

14. A water resistant adhesive composition comprising casein, an alkalinecompound and carbon-bisulphide. v I

In witness whereof, iwe hereunto subscribe our namesthis 19th da of April, 1926. I c HU H F. RIPPEY.

' i CHARLES N. CONE. IGLENN DAVIDSON. IRVING F. LAUCKS. HARRY P. BANKS.

man awatei' adhesive it nmg'fi profieifiior animal origin in aqueous a b bisulphide. 7 I

2. The process water resistant adhesive which comprises treating 1 Pam an adhesive mixture containing casein in Carbon blsulphlde 5 aqueous media with a sulphur derivative of Water: 600 carbonic acid. f f p 3. The process 0 manu acturing a water (6) 83 552552 "YT resistant adhesive which comprises treat- Cmb...bi.u1 ;i.;a;:::::i:::::: .10 mg anadhesive coneininecasem m 4 Water 600 aqueous media w1th carbon blsulphide. The process of manufacturmg a Water blood l -e resistant adhesive WhlCh comprises treating Ammonia an adhesive mixture containing protein of x v blsulphlde 20% animal origin in alkaline aqlkteous media with a a sul hur derivative of car onic acid. 5. The roces'sof manufacturing a water (8) Dned egg albumen 100 resistant :Fdhesive which comprises treating II Q 5 V I Ammomai 17/2 an'adhesive mixture containing protein of Carbon bisulphlde 5 Water 600 anlmal origin'inalkahne aqueous medla with carbon bisulphide- .g llat 38 6. The process of manufacturing a water a clum 3 Ta resistant adhesive which comprises treating Sodium silicate"; 210 an adhesive mixture containing casein in al- Thio-carbanilid j 20 kaline aqueous media with a sulphur deriva- Watel 960 vtive'of carbonic. acid. I

(10) Casein 300 tThte p'fice'ss of lrlnaliliufacturing ta water Calcium hydrate 60 resls an elvev W 10 q P g 20 an adhesive mixture contaimng caseln 1n al-- ggigg g l gii kaline aqueous media with carbon bisulph de. Wafer :T 1000 8. -A water resistant adhesive composition i u com risin roteinof animal origin and car- P g P g og hlde glue bon bisulphide; I dh v a F A .9. A water resistant a esive composition 9 1? yd i comprising casein and a'sulphur derivative Thlo'calbamhd 10 ofcarboni'c acid. v f h 12 1 200 10. Awater resistant ad eslve compositlon wg i fi 600 comprising casein and carbon b1sulph1de. Calcium 1 5 11. A water resistant adhesive composition P t i h 1 comprising protein of animal origin, an alkaline com ound and a sul hur derivative of- Y b P P Blood carbonic acld. 1 r a m pw-e- -e /2 12. A water resistant adhesive composlifi g m M -""73"?- f .tion comprising protein of animal origin, an

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